NVIDIA GeForce GT 640 vs AMD Radeon HD 6990

VS

NVIDIA GeForce GT 640

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 2GB VRAM Radeon HD 6990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 1 years and 3 months late

Lower TDP (65W vs 375W)

AMD Radeon HD 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 28.51GB/s)

1152 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon HD 6990 +267%

2.55 TFLOPS

GeForce GT 640

VS

Radeon HD 6990

Graphics Card

Jun 2012

Release Date

Mar 2011

GeForce 600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

160.0GB/s

Render Config

-

Compute Units

24

-

384

Shading Units

1536

32

TMUs

96

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

26.56 GPixel/s

28.86 GTexel/s

Texture Rate

79.68 GTexel/s

-

692.7 GFLOPS

FP32 (float)

2.550 TFLOPS

28.86 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

65W

TDP

375W

250 W

Suggested PSU

750 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 4x mini-DisplayPort 1.2

None

Power Connectors

2x 8-pin

Graphics Processor

GK107

GPU Name

Antilles

GK107-300-A2

GPU Variant

Antilles XT (215-0807027)

Kepler

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

2.64 billion

118 mm²

Die Size

389 mm²

Graphics Features

12 (11_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.1

Vulkan

N/A

3.0

CUDA

-

5.1

Shader Model

5.0

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